Sample taking device



Oct. 24, 1933. R. D, DoDDs SAMPLE TAKING DEVICE 2 Sheets-sheet 1original Filed July 15 1918 INVENTOR ILM waq TTORNY Oct. 24, 1933. R. D,DoDDs SAMPLE TAKING DEVICE Original Filed July l5 191g 2 Sheets5heet 2riff/? INVENTOR /MLW @M45 Reissued Oct. r 24, 1933 UNITED STATES SAM'PLETAKING DEVICE Redus D. Dodds, Humble,

Tex., assigner to George J. Barrett and S. Bobichaux Original No.1,295,134, dated February 25, 1919, Serial No. 244,932, July 15, 1918..Application for reissue July 25, 1933. Serial No. 682,159

8 Claims. (Cl. Z55-72) This invention relates to new and useful1mprovements in a sample taking device.

' The object of the invention is to provide a device of the characterdescribed, for obtaining samples of the formation through which thedrill bit is passing as the boring of the well progresses.

In drilling wells, particularly oil wells, it is often desirable toobtain samples of the formation for the purpose of determining thepresence or absence of oil or other minerals. This device has beenprovided for the purpose of obtaining accurate samples of the formationthrough which the bit is passing at any depth, and withdrawing the sameto the surface for inspection during the process of drilling a well.

With the above and other objects in view, the invention has particularrelation to certain novel features of construction, arrangements ofparts, and use, an example of which is given in this specification andillustrated in the accompanying drawings, wherein:

Figures 1, 2 and 3, taken in combination, show a vertical sectional viewof the device; Fig. 1, showing the upper portion, thereof, Fig. 2, themiddle portion, and Fig. 3, showing the lower end thereof.

Fig. 4 shows a transverse sectional view, taken on the line 4-4 of Fig.1.

Fig. 5 shows a vertical sectional view of the boring tool.

Fig. 6 shows a lower end view thereof.

Fig. 7 shows a plan view of the trap employed.

Fig. 8 shows a side elevation of the trap.

Fig. 9 shows a plan view of the trap anchor.

Fig. 10 shows a vertical sectional view thereof.

Fig. 11 shows a vertical sectional view of the implement employed, forlowering the device in the stem, and

Fig. 12 shows a vertical sectional view of a shing tool for withdrawingthe `device from the well.

Referring now more particularly to the drawings, wherein like numeralsof reference designate similar parts in each bf the figures, the numeral1, refers to a tubular drill stem, having the bit 2 secured to the lowerend thereof, in the usual manner. The bit has a vertical bore 3,therethrough, for the purpose hereinafter described, and whose upper endis flared at 4.

The numeral 5, refers to a tubular barrel which extends through the bore3, of the bit, said bar- '7, whose lower end is formed into radiatingcutters 8, and this boring tool has a central passageway 9, which flaresupwardly and threadedv into which is the annular anchor 10, to whichanchor the trap, hereiriafter-iiescribed, is attached. This trapconsists of a hipd which is formed of the sections 11, 11, 11. Thesesections are concave, in form, and when the trap is closed, theiradjacent edges flt closely together. Said l sections are hinged to theanchor 10, so as to forming an extension of the corresponding slot u 13.When the sections 11 of the trap are thus attached to the anchor 10, andsaid anchor screwed into the boring tool "I, the sections 11 are therebysecured against detachment.4 Secured to the back of each trap section isa flat spring 18, whose free end normally rests against the inner wallof the boring tool 7, to hold the sections of the trap in closedposition. 'I'he b arrel 5 has a check valve 17, near its upper end andabove this has fluid outlet passageways 18. 'I'he upper end of thebarrel 5 is threaded upon the lower end of the rod 19. This rod extendsup through the tubular member 20, and

its upper end operates through an inserted coupling 21, carried by theupper end of the memy' ber 20, and threaded onto the upper end of therod 19, is the enlarged nut 22, provided to engage against the upper endof the coupling 2l, to limit the downward movement of the rod 19. Asection of the rod 19 within the member 20 is reduced, forming theannular shoulder 23, and surrounding said reduced portion and interposedbetween said shoulder and the coupling 2l, is the strong coil spring 24.The tubular member 20 has oppositely disposed vertical slots la 25, 25,and a key 26, is fitted in an alined slot in the rod 19, and fastenedtherein by means of the pin 27, said key projecting out beyond the rod19 on each side and tting into the slots 2s, 25. In case the boring i001v should en- 1 counter hard formation, which it cannot pierce, thespring 24 will yield, in effect, permitting the withdrawal of the boringtool 7, up into the bit 2, and the bit thus, in effect, reinforces saidtool and prevents it from becoming broken off.

lll

To the upper end of the coupling 21, is attached a connecting joint 28,to the upper end of which is attached an internal collar 29, andthreaded onto the upper end of this collar is the tubular anchor 30,having the oppositely disposed vertical slots 31, 31, through which theanchor blades 32, 32, project. The blades are pivoted to the anchor 30at their lower ends, by means of a bearingvpin 33, which passes throughsaid anchor and through alined bearings in the lower ends of saidblades. The coupling 29 has a central bearing 34, whose upper endisenlarged, forming the annular shoulder 35. A stem 36 operates in thebearing 34, and the upper end of this stem is formed into a conicalshaped head 37. Surrounding the stem 36, and interposed between theshoulder 35 and the head 37, is the strong coil spring 38. The lowerends of the blades 32, are formed into lingers 39, 39, and the spring 38normally holds the head 37, projected between said fingers 39, so as tohold the blades open, and projected through the slots 31, as shown inFig. l, and riveted to the inner side of the drill stem are theoppositely disposed vertical ribs 40, 40, which engage against saidblades, as the stem rotates, and force'the saine to rotate therewith,thus driving the boring tool 7. The upper end of the tubular anchor 30carries a gland 4l, through which the rod 42 extends. The lower end ofthe rod is enlarged forming the annular shoulder 43, and the enlargedhead 44, said head fitting within the anchor 30, with suiiicientclearance to allow it to move up and down without friction.

Screwed upon the upper end of the rod 42 is the coupling 45, andsurrounding the rod 42 and interposed between the gland 41 and thecoupling 45 is a strong coil spring 46. 'Ihe coupling 45 is extendedupwardly, forming the reduced neck 47, and the annular shoulder 48, andthreaded upon the upper end of the nipple is a cylindrical head 49,whose upper endsis conical shaped, and having the annular groove 50.Within the drill stem l, are the fingers 51, 51, whose upper ends arehinged to the anchor 70 within the drill stem. The hinged connectionsoi!v said fingers to said drill stem are formed in the same manner asthe hinged connections of the trap sections 11, to the anchor l0, andwill not be here further described in detail. The lower end of thelingers 51, 51, are free and are held in engagement with the shoulder48, by means of the flat springs 52, 52, whose upper ends are secured,respectively, to the fingers and whose lower ends are outwardly curvedand rest against the inner wall of the drill stem l.

For the purpose of letting the device down into the drill stem, I haveprovided an implement as shown in Fig. 11, wherein the numeral 53 refersto a tube having a spider 54, xed therein near its lower end, with acentral orifice 55, through which the rod 56, passes, said rod having anenlarged head 57, at its upper endto prevent its detachment from thespider. The lower end of the rod has a head 58, to the opposite sides ofwhich are pivoted the levers 59, 59, the lower ends of said levers beingturned inwardly, forming the fingers 60, 60, provided to engage in thegroove 50, of the head 49. The upper ends of the levers are arcuate inform, being curved outwardly and interposed between them is the pushspring 61, which passes through the rod 56, and is provided to hold theiingers 60 in engagement in said groove. In order to lower the device,into the well, the angers are engaged over said head as shown in Fig.11, and the entire device then lowered through the medium of a bailingline attached to the tube 53, the head 57 engaging against the spider54. The boring tool 7 is thus projected Ythrough the bit 2, until theshoulder 6 fits in the flared recess 4. 'I'he weight of the implementwill then be sustained by the head 49, and is sufficient to overcome theresistance of the spring 46, and force the shoulder 48 bewl the freeends of the fingers 51, and said free ends will be by the springs 52,forced inwardly to engage the shoulder 48, and at the same time, thelower end of the head 44, will be forced between the upper ends of theblades 42 to hold them locked in engaged position. As the tubing 53 isfurther lowered, it will pass over the upper ends of the levers 59, 59,and force them together, disengaging the fingers 60 from the head 49.Thereupon the upper end of the rod 56 contacts against the stop 72,fixed thereabove on the tubing 53, and at the same time, catches 62, 62,carried by the outer sides of the upper ends of the said levers 59,engage in corresponding recesses 63, 63, in the inner side of the tubing53, and the implement may be then lifted out of the well, leaving thedevice in position for operation in the drill stem l.

When the drill stem is rotated, the ribs 40 will engage against theoutwardly projecting edges of the blades 32, and will force the sampletaking device to rotate vwith said stem. As shown in Fig. 3, the boringtool 7 runs in advance of the bit 2, and as it passes through theformation, samples of said formation will pass up through the passageway9, forcing the sections 1l of the trap backwardly and gaining admittanceto the interior of the barrel 5. The surplus water admitted passes upthrough the check valve 17 and out through the water passageways 18. v

In Fig. l2, I have shown a form o f fishing tool for withdrawing thedevice from the drill stem, after the samples of the formation have beentrapped in the barrel 5. This tool consists of a casing 64, whose upperend is reduced, forming a bearing 65, and provided with fluid outlets66, 66. A stem 67 operates through said bearing to the upper end ofwhich a cable 68 is attached. To the lower end of this stem is secured ahood 69, of a size and form to fit over the head 49. Flexible fingers71, 71, are secured at their lower ends to the inner side of the hood,and their upper ends are free. The fishing tool is let down into thedrill stem by means of the cable 68, and the casing 64 passes over thehead, and forces the fingers 51, 51, outwardly, disengaging them fromthe shoulder 48, and releasing the spring 46, which immediately operatesto withdraw the head 44 from between the upper ends of the blades 32.The casing then passes on downwardly, engaging against the outer edgesof the blades 32, 32, and forcing them inwardly. The lower ends of thefingers 39, 39, operate against the sloped sides of the head 37, whichovercomes the pressure of the spring 38, and thereupon the fingers 71,71, engage under the head 49, as shown in Fig. 12. 'I'he entire devicemay be then withdrawn from the drill stem by an upward pull on the cable88, carrying with it the samples trapped in the barrel 5.

What I claim is:

l. A rotary drill ofv the class described in the 145 in said drill steminto a position passing through 150 said bore, interengaging meanscarried by-the stem and barrel, through which the rotation of the formeris imparted to the latter, said interengaging means being disengageableand said barrel being removable upwardly through the drill stem whensaid interengaging means are disengaged, a boring tool carried by thelower end of the said barrel and normally extending below said bit, atrap Within said tool, permitting the admission of the cuttings of saidtool into said barrel, and trapping the same within the barrel, and aspring so positioned as to apply a downward pressure upon said tool andto yield upwardly, whereby said tool may withdraw up into said bit whenhard formations are encountered by said tool.

2. A rotary drill of the class described in the specification, embodyingthe combination with a hollow drill stem, and a bit attached to thelower end thereof, having a central bore, of a tubular sample-receivingbarrel insertable down- `wardly in said drill stem into a positionpassing through said bore, interengaging means carried by the stem andbarrel, through which the rotation of the former is imparted to thelatter, said interengaging means being disengageable and said barrelbeing removable upwardly through the drill stem'when said interengagingmeans are disengaged, a boring tool carried by the lower end of the saidbarrel and normally extending below said bit, and 'a trap within saidtool, permitting the admission of the cuttings of said tool into saidbarrel, and trapping the same within the barrel, said barrel beingmovable upwardly a limited distance in said drill stem to permit saidtool to withdraw up into said blt when hard formations are encountered,without disengaging said interengaging means.

3. A rotary drill of` the class described in the specification,embodying the combination with a hollow drill stem, and a bit attachedto the lower end thereof, having a central bore, of a tubularsample-receiving barrel insertable downwardly in said drill stem into aposition passing through said bore, interengaging means carried by thestem and barrel, through which the rotation of the former is imparted tothe latter, said interengaging means being disengageable and said barrelbeing removable upwardly through the drill stem when said interengagingmeans are disengaged, a boring tool carried by the lower end of the saidbarrel to rotate therewith and normally extending below said bit, a trapwithin said tool, permitting the admission of the cuttings of said toolinto said barrel, and trapping the same within the barrel, and elementsinterposed between said barrel and said interengaging means, saidelements being non-rotatable but longitudinally movable with respect toeach other, whereby said barrel may move upwardly a-limited distance insaid drill stem when said interengaging means are engaged.

' 4. A rotary drill of th'e class described in the specification,embodying the combination with a hollow drill stem, and a bit attachedto the lower end thereof, having a central bore, of a tubularsample-receiving barrel insertable downwardly in said drill stem into aposition passing through said bore, interengaging means carried by thestem and barrel, through which the rotation of the former is imparted tothe latter, said interengaging .means being disengageable and saidbarrel being removable upwardly through the drill stem when saidinterengaging means are disengaged, a boring tool carried by the lowerend of the said barrel to rotate therewith and normally extending belowsaid bit, a trap within said tool, permitting the admission of thecuttings of said tool into said barrel, and trapping the same within thebarrel, elements interposed between said barrel and said interengagingmeans, said elements being non-rotatable but longitudinally movable withrespect to each other, whereby said barrel may move upwardlya limiteddistance in said drill stem and said interengaging means are engaged,and a spring associated with said elements to apply a downward pressureupon said tool, and to yield upwardly.

5. A rotary drill of the class described in the specification embodyingthe combination with a hollow drill stem and a bit attached to the lowerend thereof, having a central bore, of a tubular barrel insertabledownwardly in said drill stem into a position passing through said bore,interengaging means carried by the stem and barrel, through which therotation of the former is imparted to the latter, a boring tool carriedby the lower end of the said barrel, means so positioned as to apply adownward pressure upon said tool and to yield upwardly, and a trapwithin said tool, permitting the admission of the cuttings of said toolinto said barrel, and trapping the same within the barrel, saidinterengaging means being disengagable, and said barrel being removableupwardly through said drill stem when said interengaging means aredisengaged.

6. A rotary drill of the class described in the specification embodyingthe combination with a hollow drill stem and a bit attached to the lowerend thereof, having a central bore, of a tubular barrel insertabledownwardly in said drill stern into a position passing through saidbore, interengaging means carried by the stem and barrel, through whichthe rotation of the former is imparted to the latter, a boring toolcarried b ythe lower end of the said barrel, a trap within said tool,permitting the admission of the cuttings vof said tool into 4saidbarrel, and trapping the same within the barrel, said interengagingmeans being formed to permit the barrel to move longitudinally relativeto the stem and to maintain such rotary relation during such movement,means so positionedas to apply a downward pressure upon said tool and toyield upwardly, said interengaging means lbeing disengagebale, and saidbarrel being removable upwardly through said drill stem when saidinterengaging means are disengaged.

REDUS D. DODDS. .140

